Carbureter



C. T. MURPHY.

CARBURETER.

APPLICATION FILED JAN. 31, 1917.

1,376,156. Patented Apr. 26, 1921.

1.9 FY a .8 l a o a 11 as a a 209 4 ll 11 a? E J Fig.1. 16 o 13 o rf 6'2 5 v .19 33 L I 1 it 3 E A v v I 22 Inventor: 7 .21 Clif ord TMurphy,

as I Y e4 H AZZOWZ UNITED STATES I PATENT OFFICE.

CLIFFORD T. MURPHY, OF LOS ANGELES, CALIFORNIA, ASSIGNOR, BY DIRECT ANDMESNE ASSIGNMENTS, TO COLUMBIA CARBURETOR COMPANY, A CORPORATION OFMAINE.

CARBURETER.

Specification of Letters Patent. Patented Apr. 26, 1921.

" Application filed January 31, 1917. Serial No. 145,798.

T0 all whom it may concern:

Be it known that I, Cmrronn T. MURPHY, a citizen of the United States,residing in the city of Los Angeles, county of Los Angeles, and State ofCalifornia, have invented certain new and useful Improvements inCarbureters, of which thefollowing is a specification.

This invention relates to improvements in carbureters and refers moreparticularly to a device in which the fuel is vaporized and heated priorto entering the mixing chamber.

Among the salient objects of the invention are to provide a constructionin which the fuel passing through a carbureter of the-multiple jettypeis pre-heatcd, or vaporized, by subjecting such fuel to the actionof an electrically heated element; to provide a construction of thecharacter referred to in which the fuel is so pro-heated without in anyway affecting the normal operation of the multiple jet itself; toprovide a construction in which the electrically heated or vaporizedfuel is successively fed through a plurality of et openings and in whichsaid openings are so controlled as to prevent any tendency to choking orflooding of the mixing chamber by excess gas; to provide a constructionin which the last mentioned object is preferably accomplished by meansof a manually controlled sleeve operable from the throttle valve; toprovide a construction in which the electrical heating element as anentirety can be readily inserted in, or removed from, the main casing ofthe carbureter; to provide a construction in which the electricalheating element is effectively insulated from the main part of the car-.

bureter; to provide a construction in which the extent to which the fuelis heated or vaporized can be readily controlled; to provide aconstruction adapted for use with the cheaper and heavier fuels ofhigher boiling point, and in general to provide a simple and economicalconstruction of the character referred to.

taken on lines 3-3 of Fig. 1 and looking in the direction of the arrows.

Fig. 4 is an enlarged view of the nozzle 'la1d out flat.

Referring. to the drawings:

1 designates the main casing which takes the form of a Venturi tube; 2the float chamber which may be of any usual construction; 3 the main airinlet controlled by a butterfly valve a operable from the dash; 5designates the manifold connection; 6 the mixing chamber; 7 the inletfrom the float chamber; and 8 the nozzle.

The nozzle 8 is screw-threadedas shown at 9 into the main casing. Thisis closed at its upper end as shown at 10 and is provided near its upperpart with a series of circumferential extending apertures 11. As seenmore clearly in Fig. 4:, these apertures lie in successively elevatedplanes and form the only outlets from the nozzle. These apertures orports 11 are controlled by a vertically reciprocating sleeve 12 whichteleJ scopes over the upper end of the nozzle.

This sleeve is actuated by means of a forked lever 13 pivoted as shownat 14 to trunnions 15 carried by the sleeve. The upper end of this leverarm 13 is pivoted as shown at 16 to an arm 17 carried by the butterflythrottle 11. This tube is surrounded by a sleeve 20" formed as anextension of the nut 21 which is screw-threaded as shown at 22 to thecasing. Between the end of this nut and the casing is interposed awasher 23. Inside of the tube 19 is a steel rod 31 which has an enlargedlower end 24 forming the binding post and carrying a binding nut 25. Thebinding post is provided with a nut 26 which is screw-threaded as shownat 27 to the main nut 21. This binding post is insulated from the nut 26by means of an insulating sleeve 28 and insulated washers 29 and 30.

By arranging the ports The upper end of the steel rod 31 projectsthrough the sleeve 19 and is connected to a coil resistance wire 32.This coil extends around the tube 19 and rests at its lower end on theupper end of the sleeve 20. The

current is from the binding post through 500 F. which heats the oil to atemperature of 190 F. In one case the kerosene was a 44 Baum gravity at62 F. and after heating it was raised to a gravity of 56 Baum at 190 F.hen this heated liquid mixes with the air it vaporizes much more readilyand makes a better and more combustible mixture. It is to be understoodthat the oil can be heated or even vaporized as desired in order to getthe most effective results. The degree of heat depends, of course, uponthe gravity of theoil and also its character.

The invention is not limited to the details of construction shown exceptas set forth in the appended claims.

I claim as my invention:

1. In a carbureter, an elongated fuel feeding nozzle adapted to beinserted in a carbureting mixing chamber, said nozzle having a closedupper end and provided controlled dischargewith progressively means, anelectrical heating unit disposed within the nozzle and terminating asubstantial distance below the upper end thereof to provide a vaporizedfuel receiving reservoir of a material capacity, said unit havingheating coils to intensely heat the fuel passing therethrough to bevaporized prior to its delivery to the fuel reservoir, and movable meansembracing the nozzle for progressively opening or closing the fuelfeeding'means therein.

'2. In a carbureter, an elongated tubular feeding nozzle adapted to beinserted in. a carbureter mixing chamber, said nozzle having a closedupper end and provided with separated discharge orifices, an electricalheating unit disposed within the nozzle and spaced from the wallsthereof and terminating a substantial distance below the upper endthereof to provide a vaporized fuel receiving reservoir in the nozzle ofa material capacity, said unit having exposed heating coils extendingtherearound to intensely heat the fuel passing through the nozzle, meansfor supporting the heating unit outside of the interior of the heatingnozzle, and a movable member embracing the upper end of the nozzle,adapted to progressively open .or close the fuel discharge orifices inthe fuel receiving reservoir of the nozzle.

3. In a carbureter, an elongated tubular fuel feeding nozzle ofsubstantially uniform diameter adapted to be inserted in the mixingchamber of a carburetor, said nozzle having a closed upper end andprovided with separated vertically disposed discharge orifices, anelectrical heating unit within the nozzle spaced from the walls thereofand terminating a substantial distance below the upper end of the nozzleto provide a vaporized fuel receiving reservoir of a relatively largecapacity, said unit having exposed heating coils to intensely heat thefuel passing therethrough prior to its arrival to the vaporized fuelreceiving reservoir, and a vertically movable member slidably embracingthe upper end of the nozzle for progressively opening or closing thevertically disposed fuel discharge orifices in the fuel receivingreservoir of the nozzle.

4. In a carbureter, a fuel nozzle adapted to communicate with a mixingchamber, said nozzle having afuel discharge, an electrical heater forheating the fuel introduced to the nozzle, said nozzle being constructedto constitute a vaporized fuel reservoir of a material capacity adaptedto receive and retain a supply of vaporized fuel, and controlling meansfor the fuel discharge to permit variable quantities of the storedvaporized fuel to be discharged from the fuel nozzle.

5. In a carbureter an elongated fuel feeding nozzle adapted to projectinto a mixing chamber and having progressively controlled dischargemeans, an electrical heating unit disposed within the nozzle, saidnozzle being formed to provide a vaporized fuel receiving reservoir of amaterial capacity to store within the nozzle an appre-

